Nice thread DVcollector, great map.
I agree there will be more cities that show dolphins on their coinage.Some of the bronzes probably won't be as nice of condition as all you have posted here but still will add to the total info.
Olbia on the northern Black Sea had it's Dolphin money,(5th-4th century BC).

One from Carteia on the southern coast of Spain.

Berytus

Dolphin's played a part in a number of Greek Myths as helpers of Gods and humankind and were sacred to Aphrodite and Apollo. The stories with dolphins had been around a long time before coinage began.
http://www.pbs.org/odyssey/odyssey/...nscript.htmlAristotle wrote about and studied dolphins, might be some good info in that.